| /* |
| * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @summary Test consistent parsing of ex-RUNTIME annotations that |
| * were changed and separately compiled to have CLASS retention |
| * @run main AnnotationTypeRuntimeAssumptionTest |
| */ |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| import static java.lang.annotation.RetentionPolicy.CLASS; |
| import static java.lang.annotation.RetentionPolicy.RUNTIME; |
| |
| /** |
| * This test simulates a situation where there are two mutually recursive |
| * {@link RetentionPolicy#RUNTIME RUNTIME} annotations {@link AnnA_v1 AnnA_v1} |
| * and {@link AnnB AnnB} and then the first is changed to have |
| * {@link RetentionPolicy#CLASS CLASS} retention and separately compiled. |
| * When {@link AnnA_v1 AnnA_v1} annotation is looked-up on {@link AnnB AnnB} |
| * it still appears to have {@link RetentionPolicy#RUNTIME RUNTIME} retention. |
| */ |
| public class AnnotationTypeRuntimeAssumptionTest { |
| |
| @Retention(RUNTIME) |
| @AnnB |
| public @interface AnnA_v1 { |
| } |
| |
| // An alternative version of AnnA_v1 with CLASS retention instead. |
| // Used to simulate separate compilation (see AltClassLoader below). |
| @Retention(CLASS) |
| @AnnB |
| public @interface AnnA_v2 { |
| } |
| |
| @Retention(RUNTIME) |
| @AnnA_v1 |
| public @interface AnnB { |
| } |
| |
| @AnnA_v1 |
| public static class TestTask implements Runnable { |
| @Override |
| public void run() { |
| AnnA_v1 ann1 = TestTask.class.getDeclaredAnnotation(AnnA_v1.class); |
| if (ann1 != null) { |
| throw new IllegalStateException( |
| "@" + ann1.annotationType().getSimpleName() + |
| " found on: " + TestTask.class.getName() + |
| " should not be visible at runtime"); |
| } |
| AnnA_v1 ann2 = AnnB.class.getDeclaredAnnotation(AnnA_v1.class); |
| if (ann2 != null) { |
| throw new IllegalStateException( |
| "@" + ann2.annotationType().getSimpleName() + |
| " found on: " + AnnB.class.getName() + |
| " should not be visible at runtime"); |
| } |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| ClassLoader altLoader = new AltClassLoader( |
| AnnotationTypeRuntimeAssumptionTest.class.getClassLoader()); |
| |
| Runnable altTask = (Runnable) Class.forName( |
| TestTask.class.getName(), |
| true, |
| altLoader).newInstance(); |
| |
| altTask.run(); |
| } |
| |
| /** |
| * A ClassLoader implementation that loads alternative implementations of |
| * classes. If class name ends with "_v1" it locates instead a class with |
| * name ending with "_v2" and loads that class instead. |
| */ |
| static class AltClassLoader extends ClassLoader { |
| AltClassLoader(ClassLoader parent) { |
| super(parent); |
| } |
| |
| @Override |
| protected Class<?> loadClass(String name, boolean resolve) |
| throws ClassNotFoundException { |
| if (name.indexOf('.') < 0) { // root package is our class |
| synchronized (getClassLoadingLock(name)) { |
| // First, check if the class has already been loaded |
| Class<?> c = findLoadedClass(name); |
| if (c == null) { |
| c = findClass(name); |
| } |
| if (resolve) { |
| resolveClass(c); |
| } |
| return c; |
| } |
| } |
| else { // not our class |
| return super.loadClass(name, resolve); |
| } |
| } |
| |
| @Override |
| protected Class<?> findClass(String name) |
| throws ClassNotFoundException { |
| // special class name -> replace it with alternative name |
| if (name.endsWith("_v1")) { |
| String altName = name.substring(0, name.length() - 3) + "_v2"; |
| String altPath = altName.replace('.', '/').concat(".class"); |
| try (InputStream is = getResourceAsStream(altPath)) { |
| if (is != null) { |
| byte[] bytes = is.readAllBytes(); |
| // patch class bytes to contain original name |
| for (int i = 0; i < bytes.length - 2; i++) { |
| if (bytes[i] == '_' && |
| bytes[i + 1] == 'v' && |
| bytes[i + 2] == '2') { |
| bytes[i + 2] = '1'; |
| } |
| } |
| return defineClass(name, bytes, 0, bytes.length); |
| } |
| else { |
| throw new ClassNotFoundException(name); |
| } |
| } |
| catch (IOException e) { |
| throw new ClassNotFoundException(name, e); |
| } |
| } |
| else { // not special class name -> just load the class |
| String path = name.replace('.', '/').concat(".class"); |
| try (InputStream is = getResourceAsStream(path)) { |
| if (is != null) { |
| byte[] bytes = is.readAllBytes(); |
| return defineClass(name, bytes, 0, bytes.length); |
| } |
| else { |
| throw new ClassNotFoundException(name); |
| } |
| } |
| catch (IOException e) { |
| throw new ClassNotFoundException(name, e); |
| } |
| } |
| } |
| } |
| } |